Germany did not commit its full military capacity in the invasion of Britain in 1941, Hitler allowed Britain to survive.
The invasion of the Soviet Union was to prove a huge mistake; it undid all the gains made by the Nazi-Soviet Pact and once again pushed many into a war on two fronts.
Stephan Lee observes the effects of Operation Barbarossa as a commitment made by Germany to a power three times the size of its population. He goes on to indicate that this took the pressure of Britain and greatly assisted the industrial capacity of the war effort.
Declaring war on the USA (11th of September 1941), was another error and showed the serious lack of judgement on Hitler's part.
Hitler's personal conduct of military operations was disastrous.
He focused developing V-rockets when large-scale production of jet aircraft could have restored German air superiority and weakened Allied bombing campaigns between 1944 and 1945.
Women were not employed in German and Japanese munition factories.
Hitler faced economic difficulties after 1942 which allowed the Allies to grow stronger.
Russia was producing more and better quality armaments than Germany by 1943, and the Americans had reached full capacity, producing 70,000 tanks and 120,000 aircraft a year.
Richard Overy points out that the greater economic resources and more armaments did not in themselves guarantee victory for the Allies. The key to the success was turning economic strength into effective fighting power.
The Allies had learnt from their mistakes in 1941 and increased the effectiveness of future combat.
They improved the quality as well as the quantity of military forces and technology.
They ensured excellent back-up services were available.
They set up a large civilian apparatus to support the Allied forces, which allowed them to mobilise their economic, intellectual, and organisational strength for waging war.
85% of America's war effort was developed to defeating Germany, while the other was to defeat Japan.
The Allies poured massive amounts of money and effort into a strategic bombing campaign, and this had a serious effect on Germany's capacity of effective fighting on the front.
Civilians were mobilised in all countries to help.
The major combatants mobilised between a half and two-thirds of their industrial workforce.
Apart from the USA, vital resources of each country were directed towards war effort, with restricted goods and rationed foods.
Britain carefully controlled conscription and introduced women into the British industry, agriculture, and administration more so than in World War I.
Germany had little change in the economy as its early victories (see Blitzkreig) were of not much strain on the home front.
Germany's strict belief in on Kinder, Küche, Kirche meant that women maintained a place in the home and the production of consumer goods remained a priority, so only essential industries could not be transferred.
The Soviet Union had effectively mobilised.
Coercion played a key role and civilians were moved and worked harder.
Slacking or absenteeism was punishable by death.
Richard Overy notes that the Russian civilians are the "real heroes" of the USSR's economic revival after Nazi invasion (as they suffered appauling conditions, long hours, poor nutrition, and political scrutiny).
In America women also played a key role in war industries; doing semi-skilled jobs such as crane operators, tool makers, sheel loaders, aircraft makers, and lumberjacks. They also participated in uniformed groups such as the Navy Nurse Corps and Women's Army Auxiliary Corps.
Japan shared a similar view with Germany was reluctant in using women in the workforce, preferring conscript students.
Propaganda was an important weapon for governments as it increased morale and support.
Germany utilised propaganda to justify its actions, and 'Goebbels stoke the German fear of communism in the East.
Stalin cleverly dubbed the war as the Great Patriotic War in which defense of the 'motherland' rather than the brutal communist state was motivating people.
In Britain, the main attitudes for war came from the war scare in 1938 in which public opinion in Britain hardened and generally, the British were ready for war, though lacking enthusiasm amongst its soldiers.
In America, the attack on Pearl Harbour in 1941 had changed the attitudes of the Americans.
In Britain, Churchill established the Political Warfare Executive to maintain censorship and propaganda.
Propaganda against the Japanese, however, was entirely different as portrayed the entire race as evil, rather than the German regime that was the Nazis. The general attitudes of the Japanese were openly racist and the portrayal in propaganda was that of primitive, uncivilised and inferior nature.